锆、铁水合氧化物对磷酸根的吸附  

THE ADSORPTION BEHAVIOR OF ZIRCONIUM AND IRON HYDROXIDES FOR PHOSPHATE

作　　者：董庆洁[1] 周学永[1] 邵仕香[1] 孟欣[1] 郭星[1] 丁涛[1] 

机构地区：[1]天津理工大学生物与化学工程学院,天津300191

出　　处：《离子交换与吸附》2006年第4期363-368,共6页Ion Exchange and Adsorption

基　　金：天津市自然科学基金(项目编号:023608111)

摘　　要：将氯氧化锆、三氯化铁分别与双氧水和氨水反应,生成锆、铁水合金属氧化物。用这两种氧化物作为吸附剂对水中的磷进行吸附。讨论了吸附过程对吸附容量的影响因素(温度、pH、时间)及除磷机理。实验结果表明,在低的pH值下,吸附容量最大;该吸附过程主要是以离子交换反应进行的吸热过程;可以用Freundlich方程表示静态吸附的吸附等温线;吸附动力学符合一级反应方程。Two hydroxides metal were obtained by reaction of ZrCl.8H2O, FeCl3 and H2O2, NH3.H2O. They were used to remove phosphate from aqueous solutions in this study. The influences of suspension pH, temperature, time and mechanisms on removal phosphate were investigated. It shown that the adsorbents have bigger adsorptive capacity at low pH of the solution; phosphate removal probably occurs with ion exchange; the relation between adsorptive capacity and equilibrium concentration fitted the Freundlich-type isotherm adsorption equation; The adsorption kinetics follows the flrst-order equation.

关 键 词：水合氧化物 磷酸根 吸附剂 离子交换 

分 类 号：TQ175.732[化学工程—硅酸盐工业] X703[环境科学与工程—环境工程]